Turner VP Michael Koetter compares CNN's transition to HD to "changing engines on a 747 while you're flying."

It's launching a high-definition service this fall. "CNN has already made its most important technical decision, selecting Sony's XDCAM HD optical format for high-definition field production," B&C reports. Here are the details...

> Jan. 16: "CNN Takes News into High-Definition Era with CNN-HD"